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ch2 problem41

Physics: Principles with Applications

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http://www.hwproblems.com/cgi-bin/book.cgi?bookid=0044&cptn=2pr41&id=62762 The acceleration of the ball is the acceleration due to gravity and it remains constant throughout the journey. The equation connecting the displacement , the initial velocity , the acceleration due to gravity , and the time taken for the journey is . The displacement becomes zero when the ball returns to the point from which it was thrown. Solve for . Rearrange. Thus, after , the ball comes back down to the starting point. To find the velocity of the ball when it comes back down to the starting point, use the equation connecting the
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Unformatted text preview: initial velocity , the final velocity , the acceleration due to gravity and the time . Substitute and solve for . Thus the final and initial velocities of the ball are equal in magnitude. In other words, the speed with which the ball is thrown up is equal to the speed with which the ball comes back down to the starting point. The negative sign indicates that the velocities are in opposite directions. http://www.hwproblems.com/cgi-bin/book.cgi?bookid=0044&cptn=2pr41&id=62762 [1/31/2008 12:13:56 PM]...
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